Raspberry Pi 4 Eurorack DIY kit

Deftaudio EuroRPi offers missing pieces to assemble RPi 4 with 5" touchscreen LCD into 26HP Eurorack module. It comes with two primary components:

• an aluminum faceplate with holes for LCD, USB ports and TRS breakout;
• a Synth Kit I/O - RPi shield which includes Audio Out, MIDI I/O and power interfacing to Eurorack power.

Introduction Video

https://youtu.be/O-rQi9Hbrpc

Components selection:

The kit is designed around the idea to use off-the-shelve components to drive the cost down where it's applicable. It's heavily relies on the external components which are easy to obtain. Faceplate has a cut for specific type of 5" 800x480 LCD, based on the DSI interface. This allows to avoid the complexity of HDMI cables, external power and USB port for touchscreen, - it all comes inside DSI port which connects with a flex cable. Faceplate also includes pre-drilled holes for USB extender cables and 3.5mm TRS breakout. There are several recommendations for mounting and cooling solutions for RPI. Those are covered in details in HW assembly guide and BOM reference list.

Synth Kit I/O:

Synth Kit I/O is a RPi shield which combines three functional blocks:

• Interfacing to Eurorack 16-pin power 5V or +12V with onboard DC-DC converter
• Audio DAC option with Burr Brown 5102A up to 192kHZ, I2S DAC
• MIDI over UART interface with input and output

Synth Kit is very modular, user can pick what components to populate for desired functionality.
The detailed SW guide covers how to enable audio and MIDI components in Raspbian or PatchBox OS.

Parts included with a purchase:

Faceplate only is included. Synth Kit I/O and TRS Breakout boards are optional. At this moment I'm not offering the complete kits or assembled units as over 90% are third-party components.

BOM list:

https://github.com/Deftaudio/Midi-boards/raw/master/Eurorack_RPi/Eurorack_RPi_synth_kit_BOM.xlsx

Links are for the reference only. You don't need to buy from this suppliers as all parts are widely available in many places.

ASSEMBLY VIDEO:

https://youtu.be/KfUyIja2pYk

HW Assembly Guide

https://github.com/Deftaudio/Midi-boards/raw/master/Eurorack_RPi/Eurorack_RPi_synth_kit_hardware_installation.pdf

Software Installation guide:

https://github.com/Deftaudio/Midi-boards/raw/master/Eurorack_RPi/Eurorack_RPi_synth_kit_software_installation.pdf

Github file repository:

https://github.com/Deftaudio/Midi-boards/tree/master/Eurorack_RPi

Andrei Kudryavtsev, Deftaudio 2008-2021.